Vaping is often marketed as a safer alternative to smoking, but many vape products contain nicotine, harmful chemicals, and heavy metals that can harm developing brains and lungs. How Switching to E Cigarettes After Smoking Cessation Affects Lung Cancer Risk Vaping harms your health Cancer Institute NSW All E Cigarettes Emit Harmful Chemicals, but Some Emit More Than Others Berkeley Lab Berkeley Lab News Center E Cigarettes (Vapes) Smoking and Tobacco Use CDC